108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2024 Ambiq Micro Inc.
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <soc.h>
|
||
|
|
|
||
|
|
#include <zephyr/drivers/interrupt_controller/gic.h>
|
||
|
|
#include <zephyr/kernel.h>
|
||
|
|
#include <zephyr/logging/log.h>
|
||
|
|
#include <zephyr/pm/pm.h>
|
||
|
|
#include <zephyr/init.h>
|
||
|
|
|
||
|
|
/* ambiq-sdk includes */
|
||
|
|
#include <am_mcu_apollo.h>
|
||
|
|
|
||
|
|
LOG_MODULE_DECLARE(soc, CONFIG_SOC_LOG_LEVEL);
|
||
|
|
|
||
|
|
void pm_state_set(enum pm_state state, uint8_t substate_id)
|
||
|
|
{
|
||
|
|
ARG_UNUSED(substate_id);
|
||
|
|
|
||
|
|
__disable_irq();
|
||
|
|
__set_BASEPRI(0);
|
||
|
|
|
||
|
|
switch (state) {
|
||
|
|
case PM_STATE_SUSPEND_TO_IDLE:
|
||
|
|
/* Put ARM core to normal sleep. */
|
||
|
|
am_hal_sysctrl_sleep(AM_HAL_SYSCTRL_SLEEP_NORMAL);
|
||
|
|
break;
|
||
|
|
case PM_STATE_SUSPEND_TO_RAM:
|
||
|
|
/* Put ARM core to deep sleep. */
|
||
|
|
/* Cotex-m: power down, register value preserve.*/
|
||
|
|
/* Cache: power down*/
|
||
|
|
/* Flash: power down*/
|
||
|
|
/* Sram: retention*/
|
||
|
|
am_hal_sysctrl_sleep(AM_HAL_SYSCTRL_SLEEP_DEEP);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
LOG_DBG("Unsupported power state %u", state);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief PM State Exit Post Operations
|
||
|
|
*
|
||
|
|
* For PM_STATE_SUSPEND_TO_IDLE:
|
||
|
|
* Nothing is needed after soc woken up.
|
||
|
|
*
|
||
|
|
* For PM_STATE_SUSPEND_TO_RAM:
|
||
|
|
* Flash, cache, sram automatically switch
|
||
|
|
* to active state on wake up
|
||
|
|
*
|
||
|
|
* @param state PM State
|
||
|
|
* @param substate_id Unused
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
void pm_state_exit_post_ops(enum pm_state state, uint8_t substate_id)
|
||
|
|
{
|
||
|
|
ARG_UNUSED(substate_id);
|
||
|
|
|
||
|
|
__enable_irq();
|
||
|
|
irq_unlock(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ambiq_power_init(void)
|
||
|
|
{
|
||
|
|
/* Enable flash.
|
||
|
|
* Currently all flash area is powered on, but we should only enable the used flash area and
|
||
|
|
* put unused flash in power down mode.
|
||
|
|
*/
|
||
|
|
if (am_hal_pwrctrl_memory_enable(AM_HAL_PWRCTRL_MEM_FLASH_MAX)) {
|
||
|
|
__ASSERT(0, "Failed to enable FLASH!");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Enable SRAM.
|
||
|
|
* Currently all SRAM area is powered on, but we should only enable the used ram area and
|
||
|
|
* put unused ram in power down mode.
|
||
|
|
*/
|
||
|
|
if (am_hal_pwrctrl_memory_enable(AM_HAL_PWRCTRL_MEM_SRAM_MAX)) {
|
||
|
|
__ASSERT(0, "Failed to enable SRAM!");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* For optimal Deep Sleep current, configure cache to be powered-down in deepsleep. */
|
||
|
|
am_hal_pwrctrl_memory_deepsleep_powerdown(AM_HAL_PWRCTRL_MEM_CACHE);
|
||
|
|
|
||
|
|
/* Power off all flash area, when go to deep sleep.*/
|
||
|
|
am_hal_pwrctrl_memory_deepsleep_powerdown(AM_HAL_PWRCTRL_MEM_FLASH_MAX);
|
||
|
|
|
||
|
|
/* Keep the used SRAM area in retention mode. */
|
||
|
|
am_hal_pwrctrl_memory_deepsleep_powerdown(AM_HAL_PWRCTRL_MEM_SRAM_MAX);
|
||
|
|
am_hal_pwrctrl_memory_deepsleep_retain(AM_HAL_PWRCTRL_MEM_SRAM_MAX);
|
||
|
|
|
||
|
|
#if defined(CONFIG_SOC_APOLLO3P_BLUE)
|
||
|
|
/*
|
||
|
|
* If user has enabled AM_HAL_SYSCTRL_DEEPSLEEP_WA in am_hal_sysctrl.h
|
||
|
|
* this will allow user to acheive lower current draw in deepsleep
|
||
|
|
*/
|
||
|
|
am_hal_sysctrl_control(AM_HAL_SYSCTRL_CONTROL_DEEPSLEEP_MINPWR_EN, 0);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
SYS_INIT(ambiq_power_init, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
|